| DAC |
| DAD |
| DAF |
| DAM |
| DAP |
| dark room |
| Darlington circuit |
| Darlington pair |
| DARPANET |
| dash |
| DAT |
| data |
| data acces |
| data acquisition |
| data acquisition card |
| data acquisition system |
| data analysis |
| data area |
| data attribute |
| data automation |
| data bank |
| data base |
| data base file |
| data bit |
| data block |
| data buffer |
| data bus |
| data cable |
| data capture |
| data capturing |
| data carrier |
| data carrier storage |
| data cartridge |
| data center |
| data centre |
| data chain |
| data chaining |
| data channel |
| data check |
| data circuit |
| data cleaning |
| data code |
| data collection |
| data communication network |
| data communications |
| data communications network |
| data compaction |
| data compression |
| data concentrator |
| data control |
| data conversion |
| data converter |
| data corruption |
| data counter |
| data declaration |
| data definition language |
| data delimiter |
| data density |
| data depedence graph |
| data description language |
| data descriptor |
| data dictionary |
| data directory |
| data display |
| data distribution |